switch branches by name match

gistfile1.txt

#! /usr/bin/env ruby
# Switch to git branch by matching part of a name

results = `git branch -l | grep -i #{ARGV[0]} | cut -f 1`
branchNames = results.split("\n").map { |bn| bn.sub(/^\*/, '').strip }

if branchNames.length == 1
  `git checkout #{branchNames.first}`
else
  puts 'More than one branch name matched'
  puts branchNames.join("\n")
end